Rush Limbaugh has a great new conspiracy theory. The villain in the new Batman movie, “The Dark Knight Rises,” is named Bane, and was first introduced in Batman comics in 1993. But no, says Limbaugh, it’s obviously a conspiracy against Mitt Romney, with his now-controversial private equity firm, Bain Capital. Kind of like the conspiracy that, in anticipation of Obama’s becoming president, planted news of his birth in a Hawaiian newspaper. If only Democrats really had such foresight!